Str(x:Any, [precision:Int]):Str
Convert to string. Returns a string containing a human-readable representation of x. If the precision argument is specified, it defines the number of fractional decimal places to use for numbers. If it is not specified, the same conversion as for the Print command or the "&" operator is used.
If any parameter is EMPTY, this function returns EMPTY.
Since: PCC 0.98.3, PCC2 1.99.8
